CN114409860A - Preparation method of organic flocculant for efficiently treating sand washing wastewater - Google Patents
Preparation method of organic flocculant for efficiently treating sand washing wastewater Download PDFInfo
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- CN114409860A CN114409860A CN202210184595.5A CN202210184595A CN114409860A CN 114409860 A CN114409860 A CN 114409860A CN 202210184595 A CN202210184595 A CN 202210184595A CN 114409860 A CN114409860 A CN 114409860A
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- 239000004576 sand Substances 0.000 title claims abstract description 41
- 239000002351 wastewater Substances 0.000 title claims abstract description 35
- 238000005406 washing Methods 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003153 chemical reaction reagent Substances 0.000 claims description 52
- 229920002401 polyacrylamide Polymers 0.000 claims description 40
- 238000002156 mixing Methods 0.000 claims description 22
- 238000005576 amination reaction Methods 0.000 claims description 19
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 19
- 239000003054 catalyst Substances 0.000 claims description 18
- 239000000872 buffer Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical group [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 6
- 229940095064 tartrate Drugs 0.000 claims description 6
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 229960001124 trientine Drugs 0.000 claims description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 2
- 150000001768 cations Chemical class 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005189 flocculation Methods 0.000 abstract description 19
- 230000016615 flocculation Effects 0.000 abstract description 18
- 239000010802 sludge Substances 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 14
- 238000006683 Mannich reaction Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 235000002639 sodium chloride Nutrition 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000307 polymer substrate Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/40—Chemically modified polycondensates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
Abstract
The invention relates to a preparation method of an organic flocculant for efficiently treating sand washing wastewater, which is applied to efficient flocculation of the sand washing wastewater in the sand making industry. The synthetic organic flocculant has the characteristics of strong adaptability in sandstone wastewater (capability of treating sandstone wastewater with different fineness), high settling speed, less flocculant residues in water, strong salt resistance, low water content of formed sludge and the like, and the sandstone surface washed out by the flocculant has less organic residues, so that the performance influence of a polymer on sandstone concrete can be effectively reduced, the dosage of an additive in actual engineering application can be reduced, the cost is reduced, the synthetic reaction is simple to operate, the low-temperature reaction is realized, no waste water and waste gas is generated, and the production energy consumption can be effectively reduced.
Description
Technical Field
The invention discloses a preparation method of an organic flocculant for efficiently treating sand washing wastewater, and the prepared novel organic flocculant can resist the mineralization influence of high-salinity sand washing wastewater, has small residual quantity in water, does not influence the performance of sand stones, and belongs to the field of environment function materials.
Background
In the field of water treatment, Polyacrylamide (PAM) is a water-soluble copolymer with high chemical activity, has strong adsorption flocculation and selective flocculation effects, is widely applied to industries such as mining, mineral separation, petroleum and the like, and has good effects on flocculation sedimentation of solid suspended matters and selective adsorption of fine-grained coal particles. With the rapid development of national infrastructure, the market of sandstone aggregates rises, and the demand of partial areas is insufficient, the production of machine-made sand is divided into a dry process (winnowing stone powder) and a wet process (washing to remove powder), the wet process is mostly adopted in provinces of rivers such as Hubei, Jiangxi and Anhui, and the dry process is mostly adopted in southwest areas such as Yunnan, Guizhou and Chongqing.
In the process of wet process sand making, mud and stone powder generated in the process of crushing sand cannot be separated, so that the quality of fresh mixed concrete is influenced, and in order to meet the requirements of the industrial standard GB/T14684-2011 construction sand on the mud content of river sand of aggregate being less than or equal to 3.0% and the stone powder content of machine-made sand being less than or equal to 10%, the treatment is usually carried out in a water washing mode. The waste water which is required to be washed by the sandstone needs to be purified and can not be discharged in disorder, so that a large number of sandstone production enterprises adopt flocculating agents to accelerate solute, colloid or suspended particles in the waste water to generate flocculent precipitates in the sewage treatment process, thereby playing a role in purifying water quality and being convenient for recycling once more.
However, the inorganic (PAC)/organic (PAM) combination schemes currently employed in the sand washing industry still have a series of problems: 1) insufficient settling efficiency and rate; 2) the residual quantity of the organic flocculant in the water is too large, so that the conductivity and the viscosity of the circulating water are gradually increased, and the subsequent flocculation effect and the product quality are greatly influenced; 3) the sludge settled by flocculation has insufficient compactness and high water content, and increases difficulty for sludge transportation and disposal; 4) the lack of salt resistance greatly reduces the effect in the high salinity sand washing wastewater, so the development of a novel salt-resistant high-efficiency sedimentation flocculation material is an urgent problem to be solved in the industry.
The modification and synthesis of the polymeric flocculant through the Mannich reaction have been shown by the existing research, and the salt-resistant flocculant applied to the petrochemical industry can be prepared in principle. However, although the polymeric flocculant can obtain large and compact flocs in the oily high-salt wastewater through adsorption and bridging, the polymeric flocculant in the common salt water is curled to influence the adsorption and bridging effect, so that the large flocs cannot be obtained, and therefore, the application of the technology in the sand washing wastewater still needs synthesis technical innovation and theoretical innovation.
Disclosure of Invention
Aiming at the defects of the existing Mannich reaction modified synthetic polymeric flocculant in the preparation and use processes, the invention needs to solve the following problems:
1. the polymer substrate selected by the conventional flocculating agent synthesized by the Mannich reaction is usually hydrolyzed polyacrylamide, so that the limitations of slow hydrolysis speed, high material secondary processing cost and the like exist, the invention needs to solve the problems that the conventional polyacrylamide materials with different specifications in the market can be directly synthesized by the Mannich reaction, and the problems of high molecular weight, easy crosslinking, long reaction time, insufficient reaction and the like of the polyacrylamide in the synthesis process are solved;
2. the problem of regulating and controlling the molecular weight of the synthetic material is solved, so that the molecular weight and the viscosity of the synthetic material are in an optimal position, on one hand, the viscosity accumulated in the sand washing wastewater circulating process is not increased, and on the other hand, the flocculation sedimentation efficiency of the synthetic material is ensured;
3. solves the problems of insufficient compactness and high water content of the flocculated and settled sludge.
In order to solve the technical problems, the invention provides a preparation method of an organic flocculant for efficiently treating sand washing wastewater, which comprises the following steps:
step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1-3 h at normal temperature;
the ionic type of the polyacrylamide in the step 1 comprises anion, cation and non-ionic type, the molecular weight of the polyacrylamide is 800-2500 ten thousand, and the ionic degree is 10-60%;
the blending reagent in the step 1 is one or two of citrate, tartrate, acid tartrate and phosphate;
in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1 (2-50) to 0.1-1;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 30-240 min at the temperature of 0-40 ℃;
the amination reagent in the step 2 is one or two of ethylenediamine, diethylenetriamine and triethylene tetramine;
the aldehyde reagent in the step 2 is formaldehyde or acetaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step (1), the amination reagent, the aldehyde water agent and the catalyst is 1: (0.1-1): (0.01-1): (0.001 to 0.01);
and step 3: adding deionized water in a certain proportion into the solution, and stirring for 10-30 minutes at normal temperature to complete preparation;
the mass ratio of the solution to the water in the step 3 is 1: (0.01-0.1).
The invention provides a preparation method of an organic flocculant for efficiently treating sand washing wastewater, which takes a common polyacrylamide material with mature technology on the market as a polymer substrate, adopts a blending buffer reagent to realize Mannich reaction one-step synthesis of the substrate, an amination reagent and an aldehyde reagent, and finally forms an efficient flocculant material with a salt resistance function, and has the following beneficial effects:
1. the method abandons the method that the traditional Mannich reaction adopts hydrolyzed polyacrylamide as a raw material of a modified flocculant, and through the addition of a blending buffer reagent, the conventional polyacrylamide material has good substitutability of each group, the mixed solution has good buffer performance and is not easy to crosslink in the Mannich reaction process, and the mixed solution has good deflocculation performance to prevent the layering phenomenon caused by flocculation and sedimentation of the polyacrylamide material in the reaction process;
2. compared with the traditional technology for preparing the modified flocculant by the Mannich reaction, the flocculation material prepared by the invention can effectively control the parameters of the flocculation material, such as molecular weight, ionic degree, viscosity and the like, within the optimal range. In the sand washing wastewater treatment process, if the molecular weight and other values are too large, the viscosity of the treated wastewater is high, and the residue of the flocculating agent is high, so that the wastewater cannot be recycled; if the numerical value is too small, the sand with different fineness of the wastewater can not be rapidly settled;
3. the prepared flocculating material has good stability, and can solve the problem that the conventional flocculating material (polyacrylamide flocculant or PAC flocculant) is easy to absorb moisture and deteriorate in the storage process;
4. the flocculation sludge formed in the flocculation process of the flocculation material prepared by the invention has no heavy metal component, high sludge compactness and good biochemical performance, and is beneficial to later-stage sludge transportation and recycling.
Detailed Description
The technical solution of the present invention is further explained by several specific examples below.
Example 1
Step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1h at normal temperature;
the ion type of the polyacrylamide in the step 1 is anionic, the molecular weight of the polyacrylamide is 800 ten thousand, and the ion degree of the polyacrylamide is 10%;
the blending reagent in the step 1 is citrate;
in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1:10: 0.1;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 30 min at the temperature of 30 ℃;
the amination reagent in the step 2 is ethylenediamine;
the aldehyde reagent in the step 2 is formaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step 1, the amination reagent, the aldehyde aqueous solution and the catalyst is 1: 1: 0.01: 0.001;
and step 3: adding deionized water in a certain proportion into the solution, and stirring for 10 minutes at normal temperature to complete preparation;
the mass ratio of the solution to the water in the step 3 is 1: 0.01.
the molecular weight of the flocculated material prepared in this example was 900 ten thousand with an ionic degree of 3%. The organic flocculant for efficiently treating the sand washing wastewater is applied to a sand washing wastewater treatment experiment, a water sample used in the experiment is derived from the sand washing wastewater, the turbidity is 511 NTU, the adding amount of the flocculant is 0.01ppm, the settling time required by flocculation is 18 seconds, and the turbidity removal rate is 92%.
Example 2
Step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1h at normal temperature;
the ion type of the polyacrylamide in the step 1 is cationic, the molecular weight of the polyacrylamide is 1200 ten thousand, and the ion degree of the polyacrylamide is 30%;
the blending reagent in the step 1 is tartrate;
in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1:20: 0.1;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 240 min at 20 ℃;
the amination reagent in the step 2 is diethylenetriamine;
the aldehyde reagent in the step 2 is acetaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step 1, the amination reagent, the aldehyde aqueous solution and the catalyst is 1: 0.1: 1: 0.002;
and step 3: adding deionized water in a certain proportion into the solution, and stirring for 30 minutes at normal temperature to finish preparation;
the mass ratio of the solution to the water in the step 3 is 1: 0.1.
the molecular weight of the flocculated material prepared in this example was 1300 ten thousand with an ionic degree of 50%. The organic flocculant for efficiently treating the sand washing wastewater is applied to a sand washing wastewater treatment experiment, a water sample used in the experiment is derived from the sand washing wastewater, the turbidity is 511 NTU, the adding amount of the flocculant is 0.01ppm, the settling time required by flocculation is 12 seconds, and the turbidity removal rate is 95%.
Example 3
Step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1-3 h at normal temperature;
the ion type of the polyacrylamide in the step 1 is anionic, the molecular weight of the polyacrylamide is 2500 ten thousand, and the ion degree of the polyacrylamide is 60 percent;
the blending reagent in the step 1 is acid tartrate and phosphate, and the mixing ratio is 1: 1;
in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1:50: 1;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 180 min at 40 ℃;
the amination reagent in the step 2 is triethylene tetramine;
the aldehyde reagent in the step 2 is acetaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step 1, the amination reagent, the aldehyde aqueous solution and the catalyst is 1: 0.5: 0.06: 0.005;
and step 3: adding deionized water in a certain proportion into the solution, and stirring for 30 minutes at normal temperature to finish preparation;
the mass ratio of the solution to the water in the step 3 is 1: 0.1.
the molecular weight of the flocculated material prepared in this example was 1800 ten thousand with an ionicity of 50%. The organic flocculant for efficiently treating the sand washing wastewater is applied to a sand washing wastewater treatment experiment, a water sample used in the experiment is derived from the sand washing wastewater, the turbidity is 511 NTU, the adding amount of the flocculant is 0.01ppm, the settling time required by flocculation is 10 seconds, and the turbidity removal rate is 99%.
Example 4
Step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1-3 h at normal temperature;
the ion type of the polyacrylamide in the step 1 is anionic, the molecular weight of the polyacrylamide is 1700 ten thousand, and the ion degree of the polyacrylamide is 40%;
the blending reagent in the step 1 is phosphate;
in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1:30: 0.1;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 60 min at 25 ℃;
the amination reagent in the step 2 is ethylenediamine or triethylene tetramine, and the mixing ratio is 1: 2;
the aldehyde reagent in the step 2 is formaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step 1, the amination reagent, the aldehyde aqueous solution and the catalyst is 1: 0.3: 0.07: 0.08;
and step 3: adding deionized water in a certain proportion into the solution, and stirring for 15 minutes at normal temperature to finish preparation;
the mass ratio of the solution to the water in the step 3 is 1: 0.05.
the molecular weight of the flocculation material prepared in the embodiment is 1200 ten thousand, and the ionic degree is 40%. The organic flocculant for efficiently treating the sand washing wastewater is applied to a sand washing wastewater treatment experiment, a water sample used in the experiment is derived from the sand washing wastewater, the turbidity is 511 NTU, the adding amount of the flocculant is 0.01ppm, the settling time required by flocculation is 13 seconds, and the turbidity removal rate is 95%.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various changes and modifications may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. A preparation method of an organic flocculant for efficiently treating sand washing wastewater comprises the following steps:
step 1: dissolving polyacrylamide with different specifications with water and a blending buffer reagent, and stirring and dissolving for 1-3 h at normal temperature;
step 2: adding an amination reagent, an aldehyde reagent and a catalyst into the solution in sequence, and reacting for 30-240 min at the temperature of 0-40 ℃;
and step 3: and adding deionized water in a certain proportion into the solution, and stirring for 10-30 minutes at normal temperature to finish the preparation.
2. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: the ionic type of the polyacrylamide in the step 1 comprises anion, cation and non-ionic type, the molecular weight of the polyacrylamide is 800-2500 ten thousand, and the ionic degree of the polyacrylamide is 10-60%.
3. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: the blending buffer reagent in the step 1 is one or two of citrate, tartrate, acid tartrate and phosphate.
4. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: in the step 1, the mass ratio of the polyacrylamide to the water to the blending buffer reagent is 1 (2-50) to 0.1-1.
5. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: and the amination reagent in the step 2 is one or two of ethylenediamine, diethylenetriamine and triethylene tetramine.
6. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: the aldehyde reagent in the step 2 is formaldehyde or acetaldehyde, the catalyst is nickel oxide, and the mass ratio of the solution prepared in the step (1), the amination reagent, the aldehyde water agent and the catalyst is 1: (0.1-1): (0.01-1): (0.001-0.01).
7. The preparation method of the organic flocculant for efficiently treating sand washing wastewater according to claim 1, which is characterized by comprising the following steps of: the mass ratio of the solution in the step 3 to the deionized water is 1: (0.01-0.1).
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247838A (en) * | 1998-09-17 | 2000-03-22 | 吕广明 | Cationic high-molecular flocculant and its preparation |
| CN101186370A (en) * | 2007-12-11 | 2008-05-28 | 南京师范大学 | Method for purifying chromium-containing industrial waste water by using composite flocculant |
| RU2013112463A (en) * | 2013-03-19 | 2014-09-27 | Елена Викторовна Ульрих | FLOCULANT BASED ON POLYACRYLAMIDE |
-
2022
- 2022-02-28 CN CN202210184595.5A patent/CN114409860A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247838A (en) * | 1998-09-17 | 2000-03-22 | 吕广明 | Cationic high-molecular flocculant and its preparation |
| CN101186370A (en) * | 2007-12-11 | 2008-05-28 | 南京师范大学 | Method for purifying chromium-containing industrial waste water by using composite flocculant |
| RU2013112463A (en) * | 2013-03-19 | 2014-09-27 | Елена Викторовна Ульрих | FLOCULANT BASED ON POLYACRYLAMIDE |
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